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Financial Instruments and Derivative Instruments (Details 3) - USD ($)
$ in Millions
Jun. 28, 2015
Dec. 31, 2014
Long-term debt    
Gross carrying amount $ 578.5 $ 579.7
Estimated fair value $ 591.5 $ 599.3
5.85% Senior notes due 2016    
Senior notes    
Interest rate (as a percent) 5.85%  
5.05% Senior notes due 2020    
Senior notes    
Interest rate (as a percent) 5.05%